Ultraviolet Emission from Cerium-Based Organic-Inorganic Hybrid Halides and Their Abnormal Anti-Thermal Quenching Behavior

Qiujie Wang; Tianxin Bai; Sujun JiHongyuan ZhaoXuan MengRuiling ZhangJunke JiangFeng Liu

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Ultraviolet Emission from Cerium-Based Organic-Inorganic Hybrid Halides and Their Abnormal Anti-Thermal Quenching Behavior

机译：Ultraviolet Emission from Cerium-Based Organic-Inorganic Hybrid Halides and Their Abnormal Anti-Thermal Quenching Behavior

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Rare earth elements are widely employed and investigated as dopants inluminescent materials because of their ability to modulate hosts’ specificphysical and chemical properties. However, stable phosphors crystallizedwith pure rare earth elements are few and hence their potential for widerutilization is largely limited. Herein, two examples of cerium (Ce)-basedorganic–inorganic hybrid halides, (DFPD)_4CeX_7 (DFPD+ = 4,4-difluoropiperidinium;X~? = Cl~? and Br~?) and (DFPD)CeCl_4·2MeOH are demonstrated. TheCl compositions of both examples are capable of emitting the fascinatingultraviolet (UV) light (350–375 nm), which represents the shortest emissionwavelength ever reported in existing metal halide perovskites. Moreover, theresulting crystals are of high quality, which have intrinsic photoluminescencequantum yields of 95–100. Besides, in contrast to their all-inorganic counterpartslike Ce_3CeBr_6, the proposed two forms of Ce~(3+)-based halides showabnormal anti-thermal quenching behavior (≈128 of emission intensityat 420 K relative to 80 K), being particularly applicable for practical use in aheated environment. A phosphor-converted light-emitting diode fabricatedwith (DFPD)_4CeCl_7 demonstrates stable UV emission (840 min) and has ahigh external quantum efficiency of 1. This study opens up the way to apossible design of robust UV-emitting structures based on rare earth hybridmetal halides.

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来源
《Advanced functional materials》 |2023年第34期|2303399.1-2303399.10|共10页
作者
Qiujie Wang; Tianxin Bai; Sujun JiHongyuan ZhaoXuan MengRuiling ZhangJunke JiangFeng Liu;
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作者单位

Institute of Molecular Sciences and EngineeringInstitute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237, P. R. China;

Materials Simulation and ModellingDepartment of Applied Physics, and Center for Computational EnergyResearchDepartment of Applied PhysicsEindhoven University of Technology5600 MB Eindhoven, The Netherlands;

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正文语种英语
中图分类无线电电子学、电信技术;工程材料学;
关键词
down-conversion UV LEDs; lead-free metal halides; lanthanide perovskites; organic–inorganic cerium halides; UV phosphors;

Ultraviolet Emission from Cerium-Based Organic-Inorganic Hybrid Halides and Their Abnormal Anti-Thermal Quenching Behavior

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